dhd: import wifi and bluetooth firmware

[GitHub/LineageOS/G12/android_hardware_amlogic_kernel-modules_dhd-driver.git] / bcmdhd.1.579.77.41.1.cn / bcmwifi_channels.c

/*
 * Misc utility routines used by kernel or app-level.
 * Contents are wifi-specific, used by any kernel or app-level
 * software that might want wifi things as it grows.
 *
 * Copyright (C) 1999-2017, Broadcom Corporation
 * 
 *      Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 * 
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions of
 * the license of that module.  An independent module is a module which is not
 * derived from this software.  The special exception does not apply to any
 * modifications of the software.
 * 
 *      Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Broadcom software provided under a license
 * other than the GPL, without Broadcom's express prior written consent.
 *
 *
 * <<Broadcom-WL-IPTag/Open:>>
 *
 * $Id: bcmwifi_channels.c 612483 2016-01-14 03:44:27Z $
 */

#include <bcm_cfg.h>
#include <typedefs.h>
#include <bcmutils.h>

#ifdef BCMDRIVER
#include <osl.h>
#define strtoul(nptr, endptr, base) bcm_strtoul((nptr), (endptr), (base))
#define tolower(c) (bcm_isupper((c)) ? ((c) + 'a' - 'A') : (c))
#else
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#ifndef ASSERT
#define ASSERT(exp)
#endif
#endif /* BCMDRIVER */

#include <bcmwifi_channels.h>

#if defined(WIN32) && (defined(BCMDLL) || defined(WLMDLL))
#include <bcmstdlib.h>  /* For wl/exe/GNUmakefile.brcm_wlu and GNUmakefile.wlm_dll */
#endif

/* Definitions for D11AC capable Chanspec type */

/* Chanspec ASCII representation with 802.11ac capability:
 * [<band> 'g'] <channel> ['/'<bandwidth> [<ctl-sideband>]['/'<1st80channel>'-'<2nd80channel>]]
 *
 * <band>:
 *      (optional) 2, 3, 4, 5 for 2.4GHz, 3GHz, 4GHz, and 5GHz respectively.
 *      Default value is 2g if channel <= 14, otherwise 5g.
 * <channel>:
 *      channel number of the 5MHz, 10MHz, 20MHz channel,
 *      or primary channel of 40MHz, 80MHz, 160MHz, or 80+80MHz channel.
 * <bandwidth>:
 *      (optional) 5, 10, 20, 40, 80, 160, or 80+80. Default value is 20.
 * <primary-sideband>:
 *      (only for 2.4GHz band 40MHz) U for upper sideband primary, L for lower.
 *
 *      For 2.4GHz band 40MHz channels, the same primary channel may be the
 *      upper sideband for one 40MHz channel, and the lower sideband for an
 *      overlapping 40MHz channel.  The U/L disambiguates which 40MHz channel
 *      is being specified.
 *
 *      For 40MHz in the 5GHz band and all channel bandwidths greater than
 *      40MHz, the U/L specificaion is not allowed since the channels are
 *      non-overlapping and the primary sub-band is derived from its
 *      position in the wide bandwidth channel.
 *
 * <1st80Channel>:
 * <2nd80Channel>:
 *      Required for 80+80, otherwise not allowed.
 *      Specifies the center channel of the first and second 80MHz band.
 *
 * In its simplest form, it is a 20MHz channel number, with the implied band
 * of 2.4GHz if channel number <= 14, and 5GHz otherwise.
 *
 * To allow for backward compatibility with scripts, the old form for
 * 40MHz channels is also allowed: <channel><ctl-sideband>
 *
 * <channel>:
 *      primary channel of 40MHz, channel <= 14 is 2GHz, otherwise 5GHz
 * <ctl-sideband>:
 *      "U" for upper, "L" for lower (or lower case "u" "l")
 *
 * 5 GHz Examples:
 *      Chanspec        BW        Center Ch  Channel Range  Primary Ch
 *      5g8             20MHz     8          -              -
 *      52              20MHz     52         -              -
 *      52/40           40MHz     54         52-56          52
 *      56/40           40MHz     54         52-56          56
 *      52/80           80MHz     58         52-64          52
 *      56/80           80MHz     58         52-64          56
 *      60/80           80MHz     58         52-64          60
 *      64/80           80MHz     58         52-64          64
 *      52/160          160MHz    50         36-64          52
 *      36/160          160MGz    50         36-64          36
 *      36/80+80/42-106 80+80MHz  42,106     36-48,100-112  36
 *
 * 2 GHz Examples:
 *      Chanspec        BW        Center Ch  Channel Range  Primary Ch
 *      2g8             20MHz     8          -              -
 *      8               20MHz     8          -              -
 *      6               20MHz     6          -              -
 *      6/40l           40MHz     8          6-10           6
 *      6l              40MHz     8          6-10           6
 *      6/40u           40MHz     4          2-6            6
 *      6u              40MHz     4          2-6            6
 */

/* bandwidth ASCII string */
static const char *wf_chspec_bw_str[] =
{
        "5",
        "10",
        "20",
        "40",
        "80",
        "160",
        "80+80",
#ifdef WL11ULB
        "2.5"
#else /* WL11ULB */
        "na"
#endif /* WL11ULB */
};

static const uint8 wf_chspec_bw_mhz[] =
{5, 10, 20, 40, 80, 160, 160};

#define WF_NUM_BW \
        (sizeof(wf_chspec_bw_mhz)/sizeof(uint8))

/* 40MHz channels in 5GHz band */
static const uint8 wf_5g_40m_chans[] =
{38, 46, 54, 62, 102, 110, 118, 126, 134, 142, 151, 159};
#define WF_NUM_5G_40M_CHANS \
        (sizeof(wf_5g_40m_chans)/sizeof(uint8))

/* 80MHz channels in 5GHz band */
static const uint8 wf_5g_80m_chans[] =
{42, 58, 106, 122, 138, 155};
#define WF_NUM_5G_80M_CHANS \
        (sizeof(wf_5g_80m_chans)/sizeof(uint8))

/* 160MHz channels in 5GHz band */
static const uint8 wf_5g_160m_chans[] =
{50, 114};
#define WF_NUM_5G_160M_CHANS \
        (sizeof(wf_5g_160m_chans)/sizeof(uint8))

/* opclass and channel information for US. Table E-1 */
static const uint16 opclass_data[] = {
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_5)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_5)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_10)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_10)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_2G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_3G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_3G |((WL_CHANSPEC_BW_10)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_3G |((WL_CHANSPEC_BW_5)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_5)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_10)&WL_CHANSPEC_BW_MASK)),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_20)&WL_CHANSPEC_BW_MASK)),
        0,
        0,
        0,
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_LOWER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_LOWER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_LOWER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_LOWER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_LOWER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_UPPER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_UPPER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_UPPER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_UPPER),
        (WL_CHANSPEC_BAND_5G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_UPPER),
        (WL_CHANSPEC_BAND_2G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_LOWER),
        (WL_CHANSPEC_BAND_2G |((WL_CHANSPEC_BW_40)&WL_CHANSPEC_BW_MASK)|WL_CHANSPEC_CTL_SB_UPPER),
};

/* convert bandwidth from chanspec to MHz */
static uint
bw_chspec_to_mhz(chanspec_t chspec)
{
        uint bw;

        bw = (chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT;
        return (bw >= WF_NUM_BW ? 0 : wf_chspec_bw_mhz[bw]);
}

/* bw in MHz, return the channel count from the center channel to the
 * the channel at the edge of the band
 */
static uint8
center_chan_to_edge(uint bw)
{
        /* edge channels separated by BW - 10MHz on each side
         * delta from cf to edge is half of that,
         * MHz to channel num conversion is 5MHz/channel
         */
        return (uint8)(((bw - 20) / 2) / 5);
}

/* return channel number of the low edge of the band
 * given the center channel and BW
 */
static uint8
channel_low_edge(uint center_ch, uint bw)
{
        return (uint8)(center_ch - center_chan_to_edge(bw));
}

/* return side band number given center channel and control channel
 * return -1 on error
 */
static int
channel_to_sb(uint center_ch, uint ctl_ch, uint bw)
{
        uint lowest = channel_low_edge(center_ch, bw);
        uint sb;

        if ((ctl_ch - lowest) % 4) {
                /* bad ctl channel, not mult 4 */
                return -1;
        }

        sb = ((ctl_ch - lowest) / 4);

        /* sb must be a index to a 20MHz channel in range */
        if (sb >= (bw / 20)) {
                /* ctl_ch must have been too high for the center_ch */
                return -1;
        }

        return sb;
}

/* return control channel given center channel and side band */
static uint8
channel_to_ctl_chan(uint center_ch, uint bw, uint sb)
{
        return (uint8)(channel_low_edge(center_ch, bw) + sb * 4);
}

/* return index of 80MHz channel from channel number
 * return -1 on error
 */
static int
channel_80mhz_to_id(uint ch)
{
        uint i;
        for (i = 0; i < WF_NUM_5G_80M_CHANS; i ++) {
                if (ch == wf_5g_80m_chans[i])
                        return i;
        }

        return -1;
}

/* wrapper function for wf_chspec_ntoa. In case of an error it puts
 * the original chanspec in the output buffer, prepended with "invalid".
 * Can be directly used in print routines as it takes care of null
 */
char *
wf_chspec_ntoa_ex(chanspec_t chspec, char *buf)
{
        if (wf_chspec_ntoa(chspec, buf) == NULL)
                snprintf(buf, CHANSPEC_STR_LEN, "invalid 0x%04x", chspec);
        return buf;
}

/* given a chanspec and a string buffer, format the chanspec as a
 * string, and return the original pointer a.
 * Min buffer length must be CHANSPEC_STR_LEN.
 * On error return NULL
 */
char *
wf_chspec_ntoa(chanspec_t chspec, char *buf)
{
        const char *band;
        uint ctl_chan;

        if (wf_chspec_malformed(chspec))
                return NULL;

        band = "";

        /* check for non-default band spec */
        if ((CHSPEC_IS2G(chspec) && CHSPEC_CHANNEL(chspec) > CH_MAX_2G_CHANNEL) ||
            (CHSPEC_IS5G(chspec) && CHSPEC_CHANNEL(chspec) <= CH_MAX_2G_CHANNEL))
                band = (CHSPEC_IS2G(chspec)) ? "2g" : "5g";

        /* ctl channel */
        ctl_chan = wf_chspec_ctlchan(chspec);

        /* bandwidth and ctl sideband */
        if (CHSPEC_IS20(chspec)) {
                snprintf(buf, CHANSPEC_STR_LEN, "%s%d", band, ctl_chan);
        } else if (!CHSPEC_IS8080(chspec)) {
                const char *bw;
                const char *sb = "";

                bw = wf_chspec_bw_str[(chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT];

#ifdef CHANSPEC_NEW_40MHZ_FORMAT
                /* ctl sideband string if needed for 2g 40MHz */
                if (CHSPEC_IS40(chspec) && CHSPEC_IS2G(chspec)) {
                        sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
                }

                snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s%s", band, ctl_chan, bw, sb);
#else
                /* ctl sideband string instead of BW for 40MHz */
                if (CHSPEC_IS40(chspec)) {
                        sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
                        snprintf(buf, CHANSPEC_STR_LEN, "%s%d%s", band, ctl_chan, sb);
                } else {
                        snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s", band, ctl_chan, bw);
                }
#endif /* CHANSPEC_NEW_40MHZ_FORMAT */

        } else {
                /* 80+80 */
                uint chan1 = (chspec & WL_CHANSPEC_CHAN1_MASK) >> WL_CHANSPEC_CHAN1_SHIFT;
                uint chan2 = (chspec & WL_CHANSPEC_CHAN2_MASK) >> WL_CHANSPEC_CHAN2_SHIFT;

                /* convert to channel number */
                chan1 = (chan1 < WF_NUM_5G_80M_CHANS) ? wf_5g_80m_chans[chan1] : 0;
                chan2 = (chan2 < WF_NUM_5G_80M_CHANS) ? wf_5g_80m_chans[chan2] : 0;

                /* Outputs a max of CHANSPEC_STR_LEN chars including '\0'  */
                snprintf(buf, CHANSPEC_STR_LEN, "%d/80+80/%d-%d", ctl_chan, chan1, chan2);
        }

        return (buf);
}

static int
read_uint(const char **p, unsigned int *num)
{
        unsigned long val;
        char *endp = NULL;

        val = strtoul(*p, &endp, 10);
        /* if endp is the initial pointer value, then a number was not read */
        if (endp == *p)
                return 0;

        /* advance the buffer pointer to the end of the integer string */
        *p = endp;
        /* return the parsed integer */
        *num = (unsigned int)val;

        return 1;
}

/* given a chanspec string, convert to a chanspec.
 * On error return 0
 */
chanspec_t
wf_chspec_aton(const char *a)
{
        chanspec_t chspec;
        uint chspec_ch, chspec_band, bw, chspec_bw, chspec_sb;
        uint num, ctl_ch;
        uint ch1, ch2;
        char c, sb_ul = '\0';
        int i;

        bw = 20;
        chspec_sb = 0;
        chspec_ch = ch1 = ch2 = 0;

        /* parse channel num or band */
        if (!read_uint(&a, &num))
                return 0;
        /* if we are looking at a 'g', then the first number was a band */
        c = tolower((int)a[0]);
        if (c == 'g') {
                a++; /* consume the char */

                /* band must be "2" or "5" */
                if (num == 2)
                        chspec_band = WL_CHANSPEC_BAND_2G;
                else if (num == 5)
                        chspec_band = WL_CHANSPEC_BAND_5G;
                else
                        return 0;

                /* read the channel number */
                if (!read_uint(&a, &ctl_ch))
                        return 0;

                c = tolower((int)a[0]);
        }
        else {
                /* first number is channel, use default for band */
                ctl_ch = num;
                chspec_band = ((ctl_ch <= CH_MAX_2G_CHANNEL) ?
                               WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G);
        }

        if (c == '\0') {
                /* default BW of 20MHz */
                chspec_bw = WL_CHANSPEC_BW_20;
                goto done_read;
        }

        a ++; /* consume the 'u','l', or '/' */

        /* check 'u'/'l' */
        if (c == 'u' || c == 'l') {
                sb_ul = c;
                chspec_bw = WL_CHANSPEC_BW_40;
                goto done_read;
        }

        /* next letter must be '/' */
        if (c != '/')
                return 0;

        /* read bandwidth */
        if (!read_uint(&a, &bw))
                return 0;

        /* convert to chspec value */
        if (bw == 2) {
                chspec_bw = WL_CHANSPEC_BW_2P5;
        } else if (bw == 5) {
                chspec_bw = WL_CHANSPEC_BW_5;
        } else if (bw == 10) {
                chspec_bw = WL_CHANSPEC_BW_10;
        } else if (bw == 20) {
                chspec_bw = WL_CHANSPEC_BW_20;
        } else if (bw == 40) {
                chspec_bw = WL_CHANSPEC_BW_40;
        } else if (bw == 80) {
                chspec_bw = WL_CHANSPEC_BW_80;
        } else if (bw == 160) {
                chspec_bw = WL_CHANSPEC_BW_160;
        } else {
                return 0;
        }

        /* So far we have <band>g<chan>/<bw>
         * Can now be followed by u/l if bw = 40,
         * or '+80' if bw = 80, to make '80+80' bw,
         * or '.5' if bw = 2.5 to make '2.5' bw .
         */

        c = tolower((int)a[0]);

        /* if we have a 2g/40 channel, we should have a l/u spec now */
        if (chspec_band == WL_CHANSPEC_BAND_2G && bw == 40) {
                if (c == 'u' || c == 'l') {
                        a ++; /* consume the u/l char */
                        sb_ul = c;
                        goto done_read;
                }
        }

        /* check for 80+80 */
        if (c == '+') {
                /* 80+80 */
                const char plus80[] = "80/";

                /* must be looking at '+80/'
                 * check and consume this string.
                 */
                chspec_bw = WL_CHANSPEC_BW_8080;

                a ++; /* consume the char '+' */

                /* consume the '80/' string */
                for (i = 0; i < 3; i++) {
                        if (*a++ != plus80[i]) {
                                return 0;
                        }
                }

                /* read primary 80MHz channel */
                if (!read_uint(&a, &ch1))
                        return 0;

                /* must followed by '-' */
                if (a[0] != '-')
                        return 0;
                a ++; /* consume the char */

                /* read secondary 80MHz channel */
                if (!read_uint(&a, &ch2))
                        return 0;
        } else if (c == '.') {
                /* 2.5 */
                /* must be looking at '.5'
                 * check and consume this string.
                 */
                chspec_bw = WL_CHANSPEC_BW_2P5;

                a ++; /* consume the char '.' */

                /* consume the '5' string */
                if (*a++ != '5') {
                        return 0;
                }
        }

done_read:
        /* skip trailing white space */
        while (a[0] == ' ') {
                a ++;
        }

        /* must be end of string */
        if (a[0] != '\0')
                return 0;

        /* Now have all the chanspec string parts read;
         * chspec_band, ctl_ch, chspec_bw, sb_ul, ch1, ch2.
         * chspec_band and chspec_bw are chanspec values.
         * Need to convert ctl_ch, sb_ul, and ch1,ch2 into
         * a center channel (or two) and sideband.
         */

        /* if a sb u/l string was given, just use that,
         * guaranteed to be bw = 40 by sting parse.
         */
        if (sb_ul != '\0') {
                if (sb_ul == 'l') {
                        chspec_ch = UPPER_20_SB(ctl_ch);
                        chspec_sb = WL_CHANSPEC_CTL_SB_LLL;
                } else if (sb_ul == 'u') {
                        chspec_ch = LOWER_20_SB(ctl_ch);
                        chspec_sb = WL_CHANSPEC_CTL_SB_LLU;
                }
        }
        /* if the bw is 20, center and sideband are trivial */
        else if (BW_LE20(chspec_bw)) {
                chspec_ch = ctl_ch;
                chspec_sb = WL_CHANSPEC_CTL_SB_NONE;
        }
        /* if the bw is 40/80/160, not 80+80, a single method
         * can be used to to find the center and sideband
         */
        else if (chspec_bw != WL_CHANSPEC_BW_8080) {
                /* figure out ctl sideband based on ctl channel and bandwidth */
                const uint8 *center_ch = NULL;
                int num_ch = 0;
                int sb = -1;

                if (chspec_bw == WL_CHANSPEC_BW_40) {
                        center_ch = wf_5g_40m_chans;
                        num_ch = WF_NUM_5G_40M_CHANS;
                } else if (chspec_bw == WL_CHANSPEC_BW_80) {
                        center_ch = wf_5g_80m_chans;
                        num_ch = WF_NUM_5G_80M_CHANS;
                } else if (chspec_bw == WL_CHANSPEC_BW_160) {
                        center_ch = wf_5g_160m_chans;
                        num_ch = WF_NUM_5G_160M_CHANS;
                } else {
                        return 0;
                }

                for (i = 0; i < num_ch; i ++) {
                        sb = channel_to_sb(center_ch[i], ctl_ch, bw);
                        if (sb >= 0) {
                                chspec_ch = center_ch[i];
                                chspec_sb = sb << WL_CHANSPEC_CTL_SB_SHIFT;
                                break;
                        }
                }

                /* check for no matching sb/center */
                if (sb < 0) {
                        return 0;
                }
        }
        /* Otherwise, bw is 80+80. Figure out channel pair and sb */
        else {
                int ch1_id = 0, ch2_id = 0;
                int sb;

                /* look up the channel ID for the specified channel numbers */
                ch1_id = channel_80mhz_to_id(ch1);
                ch2_id = channel_80mhz_to_id(ch2);

                /* validate channels */
                if (ch1_id < 0 || ch2_id < 0)
                        return 0;

                /* combine 2 channel IDs in channel field of chspec */
                chspec_ch = (((uint)ch1_id << WL_CHANSPEC_CHAN1_SHIFT) |
                             ((uint)ch2_id << WL_CHANSPEC_CHAN2_SHIFT));

                /* figure out primary 20 MHz sideband */

                /* is the primary channel contained in the 1st 80MHz channel? */
                sb = channel_to_sb(ch1, ctl_ch, bw);
                if (sb < 0) {
                        /* no match for primary channel 'ctl_ch' in segment0 80MHz channel */
                        return 0;
                }

                chspec_sb = sb << WL_CHANSPEC_CTL_SB_SHIFT;
        }

        chspec = (chspec_ch | chspec_band | chspec_bw | chspec_sb);

        if (wf_chspec_malformed(chspec))
                return 0;

        return chspec;
}

/*
 * Verify the chanspec is using a legal set of parameters, i.e. that the
 * chanspec specified a band, bw, ctl_sb and channel and that the
 * combination could be legal given any set of circumstances.
 * RETURNS: TRUE is the chanspec is malformed, false if it looks good.
 */
bool
wf_chspec_malformed(chanspec_t chanspec)
{
        uint chspec_bw = CHSPEC_BW(chanspec);
        uint chspec_ch = CHSPEC_CHANNEL(chanspec);

        /* must be 2G or 5G band */
        if (CHSPEC_IS2G(chanspec)) {
                /* must be valid bandwidth */
                if (!BW_LE40(chspec_bw)) {
                        return TRUE;
                }
        } else if (CHSPEC_IS5G(chanspec)) {
                if (chspec_bw == WL_CHANSPEC_BW_8080) {
                        uint ch1_id, ch2_id;

                        /* channel IDs in 80+80 must be in range */
                        ch1_id = CHSPEC_CHAN1(chanspec);
                        ch2_id = CHSPEC_CHAN2(chanspec);
                        if (ch1_id >= WF_NUM_5G_80M_CHANS || ch2_id >= WF_NUM_5G_80M_CHANS)
                                return TRUE;

                } else if (BW_LE160(chspec_bw)) {
                        if (chspec_ch > MAXCHANNEL) {
                                return TRUE;
                        }
                } else {
                        /* invalid bandwidth */
                        return TRUE;
                }
        } else {
                /* must be 2G or 5G band */
                return TRUE;
        }

        /* side band needs to be consistent with bandwidth */
        if (BW_LE20(chspec_bw)) {
                if (CHSPEC_CTL_SB(chanspec) != WL_CHANSPEC_CTL_SB_LLL)
                        return TRUE;
        } else if (chspec_bw == WL_CHANSPEC_BW_40) {
                if (CHSPEC_CTL_SB(chanspec) > WL_CHANSPEC_CTL_SB_LLU)
                        return TRUE;
        } else if (chspec_bw == WL_CHANSPEC_BW_80 ||
                   chspec_bw == WL_CHANSPEC_BW_8080) {
                if (CHSPEC_CTL_SB(chanspec) > WL_CHANSPEC_CTL_SB_LUU)
                        return TRUE;
        }
        else if (chspec_bw == WL_CHANSPEC_BW_160) {
                ASSERT(CHSPEC_CTL_SB(chanspec) <= WL_CHANSPEC_CTL_SB_UUU);
        }
        return FALSE;
}

/*
 * Verify the chanspec specifies a valid channel according to 802.11.
 * RETURNS: TRUE if the chanspec is a valid 802.11 channel
 */
bool
wf_chspec_valid(chanspec_t chanspec)
{
        uint chspec_bw = CHSPEC_BW(chanspec);
        uint chspec_ch = CHSPEC_CHANNEL(chanspec);

        if (wf_chspec_malformed(chanspec))
                return FALSE;

        if (CHSPEC_IS2G(chanspec)) {
                /* must be valid bandwidth and channel range */
                if (BW_LE20(chspec_bw)) {
                        if (chspec_ch >= 1 && chspec_ch <= 14)
                                return TRUE;
                } else if (chspec_bw == WL_CHANSPEC_BW_40) {
                        if (chspec_ch >= 3 && chspec_ch <= 11)
                                return TRUE;
                }
        } else if (CHSPEC_IS5G(chanspec)) {
                if (chspec_bw == WL_CHANSPEC_BW_8080) {
                        uint16 ch1, ch2;

                        ch1 = wf_5g_80m_chans[CHSPEC_CHAN1(chanspec)];
                        ch2 = wf_5g_80m_chans[CHSPEC_CHAN2(chanspec)];

                        /* the two channels must be separated by more than 80MHz by VHT req */
                        if ((ch2 > ch1 + CH_80MHZ_APART) ||
                            (ch1 > ch2 + CH_80MHZ_APART))
                                return TRUE;
                } else {
                        const uint8 *center_ch;
                        uint num_ch, i;

                        if (BW_LE40(chspec_bw)) {
                                center_ch = wf_5g_40m_chans;
                                num_ch = WF_NUM_5G_40M_CHANS;
                        } else if (chspec_bw == WL_CHANSPEC_BW_80) {
                                center_ch = wf_5g_80m_chans;
                                num_ch = WF_NUM_5G_80M_CHANS;
                        } else if (chspec_bw == WL_CHANSPEC_BW_160) {
                                center_ch = wf_5g_160m_chans;
                                num_ch = WF_NUM_5G_160M_CHANS;
                        } else {
                                /* invalid bandwidth */
                                return FALSE;
                        }

                        /* check for a valid center channel */
                        if (BW_LE20(chspec_bw)) {
                                /* We don't have an array of legal 20MHz 5G channels, but they are
                                 * each side of the legal 40MHz channels.  Check the chanspec
                                 * channel against either side of the 40MHz channels.
                                 */
                                for (i = 0; i < num_ch; i ++) {
                                        if (chspec_ch == (uint)LOWER_20_SB(center_ch[i]) ||
                                            chspec_ch == (uint)UPPER_20_SB(center_ch[i]))
                                                break; /* match found */
                                }

                                if (i == num_ch) {
                                        /* check for channel 165 which is not the side band
                                         * of 40MHz 5G channel
                                         */
                                        if (chspec_ch == 165)
                                                i = 0;

                                        /* check for legacy JP channels on failure */
                                        if (chspec_ch == 34 || chspec_ch == 38 ||
                                            chspec_ch == 42 || chspec_ch == 46)
                                                i = 0;
                                }
                        } else {
                                /* check the chanspec channel to each legal channel */
                                for (i = 0; i < num_ch; i ++) {
                                        if (chspec_ch == center_ch[i])
                                                break; /* match found */
                                }
                        }

                        if (i < num_ch) {
                                /* match found */
                                return TRUE;
                        }
                }
        }

        return FALSE;
}

/*
 * This function returns the channel number that control traffic is being sent on, for 20MHz
 * channels this is just the channel number, for 40MHZ, 80MHz, 160MHz channels it is the 20MHZ
 * sideband depending on the chanspec selected
 */
uint8
wf_chspec_ctlchan(chanspec_t chspec)
{
        uint center_chan;
        uint bw_mhz;
        uint sb;

        ASSERT(!wf_chspec_malformed(chspec));

        /* Is there a sideband ? */
        if (CHSPEC_BW_LE20(chspec)) {
                return CHSPEC_CHANNEL(chspec);
        } else {
                sb = CHSPEC_CTL_SB(chspec) >> WL_CHANSPEC_CTL_SB_SHIFT;

                if (CHSPEC_IS8080(chspec)) {
                        /* For an 80+80 MHz channel, the sideband 'sb' field is an 80 MHz sideband
                         * (LL, LU, UL, LU) for the 80 MHz frequency segment 0.
                         */
                        uint chan_id = CHSPEC_CHAN1(chspec);

                        bw_mhz = 80;

                        /* convert from channel index to channel number */
                        center_chan = wf_5g_80m_chans[chan_id];
                }
                else {
                        bw_mhz = bw_chspec_to_mhz(chspec);
                        center_chan = CHSPEC_CHANNEL(chspec) >> WL_CHANSPEC_CHAN_SHIFT;
                }

                return (channel_to_ctl_chan(center_chan, bw_mhz, sb));
        }
}

/* given a chanspec, return the bandwidth string */
const char *
wf_chspec_to_bw_str(chanspec_t chspec)
{
        return wf_chspec_bw_str[(CHSPEC_BW(chspec) >> WL_CHANSPEC_BW_SHIFT)];
}

/*
 * This function returns the chanspec of the control channel of a given chanspec
 */
chanspec_t
wf_chspec_ctlchspec(chanspec_t chspec)
{
        chanspec_t ctl_chspec = chspec;
        uint8 ctl_chan;

        ASSERT(!wf_chspec_malformed(chspec));

        /* Is there a sideband ? */
        if (!CHSPEC_BW_LE20(chspec)) {
                ctl_chan = wf_chspec_ctlchan(chspec);
                ctl_chspec = ctl_chan | WL_CHANSPEC_BW_20;
                ctl_chspec |= CHSPEC_BAND(chspec);
        }
        return ctl_chspec;
}

/* return chanspec given control channel and bandwidth
 * return 0 on error
 */
uint16
wf_channel2chspec(uint ctl_ch, uint bw)
{
        uint16 chspec;
        const uint8 *center_ch = NULL;
        int num_ch = 0;
        int sb = -1;
        int i = 0;

        chspec = ((ctl_ch <= CH_MAX_2G_CHANNEL) ? WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G);

        chspec |= bw;

        if (bw == WL_CHANSPEC_BW_40) {
                center_ch = wf_5g_40m_chans;
                num_ch = WF_NUM_5G_40M_CHANS;
                bw = 40;
        } else if (bw == WL_CHANSPEC_BW_80) {
                center_ch = wf_5g_80m_chans;
                num_ch = WF_NUM_5G_80M_CHANS;
                bw = 80;
        } else if (bw == WL_CHANSPEC_BW_160) {
                center_ch = wf_5g_160m_chans;
                num_ch = WF_NUM_5G_160M_CHANS;
                bw = 160;
        } else if (BW_LE20(bw)) {
                chspec |= ctl_ch;
                return chspec;
        } else {
                return 0;
        }

        for (i = 0; i < num_ch; i ++) {
                sb = channel_to_sb(center_ch[i], ctl_ch, bw);
                if (sb >= 0) {
                        chspec |= center_ch[i];
                        chspec |= (sb << WL_CHANSPEC_CTL_SB_SHIFT);
                        break;
                }
        }

        /* check for no matching sb/center */
        if (sb < 0) {
                return 0;
        }

        return chspec;
}

/*
 * This function returns the chanspec for the primary 40MHz of an 80MHz channel.
 * The control sideband specifies the same 20MHz channel that the 80MHz channel is using
 * as the primary 20MHz channel.
 */
extern chanspec_t wf_chspec_primary40_chspec(chanspec_t chspec)
{
        chanspec_t chspec40 = chspec;
        uint center_chan;
        uint sb;

        ASSERT(!wf_chspec_malformed(chspec));

        /* if the chanspec is > 80MHz, use the helper routine to find the primary 80 MHz channel */
        if (CHSPEC_IS8080(chspec) || CHSPEC_IS160(chspec)) {
                chspec = wf_chspec_primary80_chspec(chspec);
        }

        /* determine primary 40 MHz sub-channel of an 80 MHz chanspec */
        if (CHSPEC_IS80(chspec)) {
                center_chan = CHSPEC_CHANNEL(chspec);
                sb = CHSPEC_CTL_SB(chspec);

                if (sb < WL_CHANSPEC_CTL_SB_UL) {
                        /* Primary 40MHz is on lower side */
                        center_chan -= CH_20MHZ_APART;
                        /* sideband bits are the same for LL/LU and L/U */
                } else {
                        /* Primary 40MHz is on upper side */
                        center_chan += CH_20MHZ_APART;
                        /* sideband bits need to be adjusted by UL offset */
                        sb -= WL_CHANSPEC_CTL_SB_UL;
                }

                /* Create primary 40MHz chanspec */
                chspec40 = (WL_CHANSPEC_BAND_5G | WL_CHANSPEC_BW_40 |
                            sb | center_chan);
        }

        return chspec40;
}

/*
 * Return the channel number for a given frequency and base frequency.
 * The returned channel number is relative to the given base frequency.
 * If the given base frequency is zero, a base frequency of 5 GHz is assumed for
 * frequencies from 5 - 6 GHz, and 2.407 GHz is assumed for 2.4 - 2.5 GHz.
 *
 * Frequency is specified in MHz.
 * The base frequency is specified as (start_factor * 500 kHz).
 * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_5_G are defined for
 * 2.4 GHz and 5 GHz bands.
 *
 * The returned channel will be in the range [1, 14] in the 2.4 GHz band
 * and [0, 200] otherwise.
 * -1 is returned if the start_factor is WF_CHAN_FACTOR_2_4_G and the
 * frequency is not a 2.4 GHz channel, or if the frequency is not and even
 * multiple of 5 MHz from the base frequency to the base plus 1 GHz.
 *
 * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2
 */
int
wf_mhz2channel(uint freq, uint start_factor)
{
        int ch = -1;
        uint base;
        int offset;

        /* take the default channel start frequency */
        if (start_factor == 0) {
                if (freq >= 2400 && freq <= 2500)
                        start_factor = WF_CHAN_FACTOR_2_4_G;
                else if (freq >= 5000 && freq <= 6000)
                        start_factor = WF_CHAN_FACTOR_5_G;
        }

        if (freq == 2484 && start_factor == WF_CHAN_FACTOR_2_4_G)
                return 14;

        base = start_factor / 2;

        /* check that the frequency is in 1GHz range of the base */
        if ((freq < base) || (freq > base + 1000))
                return -1;

        offset = freq - base;
        ch = offset / 5;

        /* check that frequency is a 5MHz multiple from the base */
        if (offset != (ch * 5))
                return -1;

        /* restricted channel range check for 2.4G */
        if (start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 13))
                return -1;

        return ch;
}

/*
 * Return the center frequency in MHz of the given channel and base frequency.
 * The channel number is interpreted relative to the given base frequency.
 *
 * The valid channel range is [1, 14] in the 2.4 GHz band and [0, 200] otherwise.
 * The base frequency is specified as (start_factor * 500 kHz).
 * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_4_G, and WF_CHAN_FACTOR_5_G
 * are defined for 2.4 GHz, 4 GHz, and 5 GHz bands.
 * The channel range of [1, 14] is only checked for a start_factor of
 * WF_CHAN_FACTOR_2_4_G (4814 = 2407 * 2).
 * Odd start_factors produce channels on .5 MHz boundaries, in which case
 * the answer is rounded down to an integral MHz.
 * -1 is returned for an out of range channel.
 *
 * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2
 */
int
wf_channel2mhz(uint ch, uint start_factor)
{
        int freq;

        if ((start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 14)) ||
            (ch > 200))
                freq = -1;
        else if ((start_factor == WF_CHAN_FACTOR_2_4_G) && (ch == 14))
                freq = 2484;
        else
                freq = ch * 5 + start_factor / 2;

        return freq;
}

static const uint16 sidebands[] = {
        WL_CHANSPEC_CTL_SB_LLL, WL_CHANSPEC_CTL_SB_LLU,
        WL_CHANSPEC_CTL_SB_LUL, WL_CHANSPEC_CTL_SB_LUU,
        WL_CHANSPEC_CTL_SB_ULL, WL_CHANSPEC_CTL_SB_ULU,
        WL_CHANSPEC_CTL_SB_UUL, WL_CHANSPEC_CTL_SB_UUU
};

/*
 * Returns the chanspec 80Mhz channel corresponding to the following input
 * parameters
 *
 *      primary_channel - primary 20Mhz channel
 *      center_channel   - center frequecny of the 80Mhz channel
 *
 * The center_channel can be one of {42, 58, 106, 122, 138, 155}
 *
 * returns INVCHANSPEC in case of error
 */
chanspec_t
wf_chspec_80(uint8 center_channel, uint8 primary_channel)
{

        chanspec_t chanspec = INVCHANSPEC;
        chanspec_t chanspec_cur;
        uint i;

        for (i = 0; i < WF_NUM_SIDEBANDS_80MHZ; i++) {
                chanspec_cur = CH80MHZ_CHSPEC(center_channel, sidebands[i]);
                if (primary_channel == wf_chspec_ctlchan(chanspec_cur)) {
                        chanspec = chanspec_cur;
                        break;
                }
        }
        /* If the loop ended early, we are good, otherwise we did not
        * find a 80MHz chanspec with the given center_channel that had a primary channel
        *matching the given primary_channel.
        */
        return chanspec;
}

/*
 * Returns the 80+80 chanspec corresponding to the following input parameters
 *
 *    primary_20mhz - Primary 20 MHz channel
 *    chan0 - center channel number of one frequency segment
 *    chan1 - center channel number of the other frequency segment
 *
 * Parameters chan0 and chan1 are channel numbers in {42, 58, 106, 122, 138, 155}.
 * The primary channel must be contained in one of the 80MHz channels. This routine
 * will determine which frequency segment is the primary 80 MHz segment.
 *
 * Returns INVCHANSPEC in case of error.
 *
 * Refer to IEEE802.11ac section 22.3.14 "Channelization".
 */
chanspec_t
wf_chspec_get8080_chspec(uint8 primary_20mhz, uint8 chan0, uint8 chan1)
{
        int sb = 0;
        uint16 chanspec = 0;
        int chan0_id = 0, chan1_id = 0;
        int seg0, seg1;

        chan0_id = channel_80mhz_to_id(chan0);
        chan1_id = channel_80mhz_to_id(chan1);

        /* make sure the channel numbers were valid */
        if (chan0_id == -1 || chan1_id == -1)
                return INVCHANSPEC;

        /* does the primary channel fit with the 1st 80MHz channel ? */
        sb = channel_to_sb(chan0, primary_20mhz, 80);
        if (sb >= 0) {
                /* yes, so chan0 is frequency segment 0, and chan1 is seg 1 */
                seg0 = chan0_id;
                seg1 = chan1_id;
        } else {
                /* no, so does the primary channel fit with the 2nd 80MHz channel ? */
                sb = channel_to_sb(chan1, primary_20mhz, 80);
                if (sb < 0) {
                        /* no match for ctl_ch to either 80MHz center channel */
                        return INVCHANSPEC;
                }
                /* swapped, so chan1 is frequency segment 0, and chan0 is seg 1 */
                seg0 = chan1_id;
                seg1 = chan0_id;
        }

        chanspec = ((seg0 << WL_CHANSPEC_CHAN1_SHIFT) |
                    (seg1 << WL_CHANSPEC_CHAN2_SHIFT) |
                    (sb << WL_CHANSPEC_CTL_SB_SHIFT) |
                    WL_CHANSPEC_BW_8080 |
                    WL_CHANSPEC_BAND_5G);

        return chanspec;
}

/*
 * This function returns the 80Mhz channel for the given id.
 */
static uint8
wf_chspec_get80Mhz_ch(uint8 chan_80Mhz_id)
{
        if (chan_80Mhz_id < WF_NUM_5G_80M_CHANS)
                return wf_5g_80m_chans[chan_80Mhz_id];

        return 0;
}

/*
 * Returns the primary 80 Mhz channel for the provided chanspec
 *
 *    chanspec - Input chanspec for which the 80MHz primary channel has to be retrieved
 *
 *  returns -1 in case the provided channel is 20/40 Mhz chanspec
 */

uint8
wf_chspec_primary80_channel(chanspec_t chanspec)
{
        uint8 primary80_chan;

        if (CHSPEC_IS80(chanspec))      {
                primary80_chan = CHSPEC_CHANNEL(chanspec);
        }
        else if (CHSPEC_IS8080(chanspec)) {
                /* Channel ID 1 corresponds to frequency segment 0, the primary 80 MHz segment */
                primary80_chan = wf_chspec_get80Mhz_ch(CHSPEC_CHAN1(chanspec));
        }
        else if (CHSPEC_IS160(chanspec)) {
                uint8 center_chan = CHSPEC_CHANNEL(chanspec);
                uint sb = CHSPEC_CTL_SB(chanspec) >> WL_CHANSPEC_CTL_SB_SHIFT;

                /* based on the sb value primary 80 channel can be retrieved
                 * if sb is in range 0 to 3 the lower band is the 80Mhz primary band
                 */
                if (sb < 4) {
                        primary80_chan = center_chan - CH_40MHZ_APART;
                }
                /* if sb is in range 4 to 7 the upper band is the 80Mhz primary band */
                else
                {
                        primary80_chan = center_chan + CH_40MHZ_APART;
                }
        }
        else {
                /* for 20 and 40 Mhz */
                primary80_chan = -1;
        }
        return primary80_chan;
}

/*
 * Returns the secondary 80 Mhz channel for the provided chanspec
 *
 *    chanspec - Input chanspec for which the 80MHz secondary channel has to be retrieved
 *
 *  returns -1 in case the provided channel is 20/40/80 Mhz chanspec
 */
uint8
wf_chspec_secondary80_channel(chanspec_t chanspec)
{
        uint8 secondary80_chan;

        if (CHSPEC_IS8080(chanspec)) {
                secondary80_chan = wf_chspec_get80Mhz_ch(CHSPEC_CHAN2(chanspec));
        }
        else if (CHSPEC_IS160(chanspec)) {
                uint8 center_chan = CHSPEC_CHANNEL(chanspec);
                uint sb = CHSPEC_CTL_SB(chanspec) >> WL_CHANSPEC_CTL_SB_SHIFT;

                /* based on the sb value  secondary 80 channel can be retrieved
                 * if sb is in range 0 to 3 upper band is the secondary 80Mhz band
                 */
                if (sb < 4) {
                        secondary80_chan = center_chan + CH_40MHZ_APART;
                }
                /* if sb is in range 4 to 7 the lower band is the secondary 80Mhz band */
                else
                {
                        secondary80_chan = center_chan - CH_40MHZ_APART;
                }
        }
        else {
                /* for 20, 40, and 80 Mhz */
                secondary80_chan = -1;
        }
        return secondary80_chan;
}

/*
 * This function returns the chanspec for the primary 80MHz of an 160MHz or 80+80 channel.
 *
 *    chanspec - Input chanspec for which the primary 80Mhz chanspec has to be retreived
 *
 *  returns the input chanspec in case the provided chanspec is an 80 MHz chanspec
 *  returns INVCHANSPEC in case the provided channel is 20/40 MHz chanspec
 */
chanspec_t
wf_chspec_primary80_chspec(chanspec_t chspec)
{
        chanspec_t chspec80;
        uint center_chan;
        uint sb;

        ASSERT(!wf_chspec_malformed(chspec));
        if (CHSPEC_IS80(chspec)) {
                chspec80 = chspec;
        }
        else if (CHSPEC_IS8080(chspec)) {

                /* Channel ID 1 corresponds to frequency segment 0, the primary 80 MHz segment */
                center_chan = wf_chspec_get80Mhz_ch(CHSPEC_CHAN1(chspec));

                sb = CHSPEC_CTL_SB(chspec);

                /* Create primary 80MHz chanspec */
                chspec80 = (WL_CHANSPEC_BAND_5G | WL_CHANSPEC_BW_80 | sb | center_chan);
        }
        else if (CHSPEC_IS160(chspec)) {
                center_chan = CHSPEC_CHANNEL(chspec);
                sb = CHSPEC_CTL_SB(chspec);

                if (sb < WL_CHANSPEC_CTL_SB_ULL) {
                        /* Primary 80MHz is on lower side */
                        center_chan -= CH_40MHZ_APART;
                }
                else {
                        /* Primary 80MHz is on upper side */
                        center_chan += CH_40MHZ_APART;
                        sb -= WL_CHANSPEC_CTL_SB_ULL;
                }
                /* Create primary 80MHz chanspec */
                chspec80 = (WL_CHANSPEC_BAND_5G | WL_CHANSPEC_BW_80 | sb | center_chan);
        }
        else {
                chspec80 = INVCHANSPEC;
        }

        return chspec80;
}

#ifdef WL11AC_80P80
uint8
wf_chspec_channel(chanspec_t chspec)
{
        if (CHSPEC_IS8080(chspec)) {
                return wf_chspec_primary80_channel(chspec);
        }
        else {
                return ((uint8)((chspec) & WL_CHANSPEC_CHAN_MASK));
        }
}
#endif /* WL11AC_80P80 */

/* This routine returns the chanspec for a given operating class and
 * channel number
 */
chanspec_t
wf_channel_create_chspec_frm_opclass(uint8 opclass, uint8 channel)
{
        chanspec_t chanspec = 0;
        uint16 opclass_info = 0;
        uint16 lookupindex = 0;
        switch (opclass) {
                case 115:
                        lookupindex = 1;
                        break;
                case 124:
                        lookupindex = 3;
                        break;
                case 125:
                        lookupindex = 5;
                        break;
                case 81:
                        lookupindex = 12;
                        break;
                case 116:
                        lookupindex = 22;
                        break;
                case 119:
                        lookupindex = 23;
                        break;
                case 126:
                        lookupindex = 25;
                        break;
                case 83:
                        lookupindex = 32;
                        break;
                case 84:
                        lookupindex = 33;
                        break;
                default:
                        lookupindex = 12;
        }

        if (lookupindex < 33) {
                opclass_info = opclass_data[lookupindex-1];
        }
        else {
                opclass_info = opclass_data[11];
        }
        chanspec = opclass_info | (uint16)channel;
        return chanspec;
}

/* This routine returns the opclass for a given chanspec */
int
wf_channel_create_opclass_frm_chspec(chanspec_t chspec)
{
        BCM_REFERENCE(chspec);
        /* TODO: Implement this function ! */
        return 12; /* opclass 12 for basic 2G channels */
}